text: 'use strict';
  
  module.exports = {
      COMPARISON_OPS: ['=', '!=', '<', '>=', '>', '<='],
      COMPARISON_OPS2: ['=', '<', '>=', '>', '<='],
      INTERVAL_OPS: ['[]', '()', '[)', '(]', '][', ')(', '](', ')['],
      SET_OPS: ['{}', '}{'],
      CONSTRAINT_REDUCTION: {
          // for contour constraints, open/closed endpoints are equivalent
          '=': '=',
  
          '<': '<',
          '<=': '<',
  
          '>': '>',
          '>=': '>',
  
          '[]': '[]',
          '()': '[]',
          '[)': '[]',
          '(]': '[]',
  
          '][': '][',
          ')(': '][',
          '](': '][',
          ')[': ']['
      }
  };
  